This is a double-blind, parallel-group, placebo-controlled, multiple-dose, single-site study in healthy male and female volunteers. Oral azimilide 125 mg or placebo will be administered every 12 hours for 3 days, followed by 125 mg every 24 hours for 3 days. The study will include a total of 21 healthy subjects (14 active and 7 placebo), all of whom will be confined at the study center for 9 nights.